1: Application for intake and exhaust valve stems of automotive engines. The valve stem seal lip is designed with spring,and matching the valve stem and valve giude perfectly. The metal of some products is carburised to increase the surface hardness of the metal to replace the valve spring seat gasket. In order to maintain a stable leakage rate of the seal lip under eccentric and air pressure change conditions, some of the main seal lip has a partial support lip , or are designed with an air lip .
2: Shaft Diameter : φ5~10mm.
3: Material is FPM.
4:Operating temperature range -40~200℃.